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Singlet Oxygen Formation during the Oxygen Reduction Reaction in DMSO LiTFSI on Lithium Air Battery Carbon Electrodes
Author(s) -
Córdoba Daniel,
Rodríguez Hernán B.,
Calvo Ernesto J.
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201904112
Subject(s) - disproportionation , chemistry , quenching (fluorescence) , singlet oxygen , photochemistry , lithium (medication) , inorganic chemistry , dimethyl sulfoxide , oxygen , superoxide , sodium azide , electrolyte , fluorescence , electrode , organic chemistry , catalysis , medicine , physics , quantum mechanics , endocrinology , enzyme
Abstract Formation of singlet oxygen, 1 O 2 , during the O 2 electroreduction reaction (ORR) on carbon electrode in Lithium bis‐(tri‐fluoromethylsulfonyl)imide (LiTFSI) dimethyl sulfoxide (DMSO) electrolyte has been detected “in‐operando” by fluorescence quenching of 9,10‐dimethylanthracene, DMA. Furthermore, the formation of 1 O 2 during ORR requires Li + ions, while in the presence of the efficient physical 1 O 2 quencher, sodium azide, DMA fluorescence quenching is negligible. Addition of Li + ions to superoxide solution in DMSO formed by ORR enhances DMA quenching, which is a proof that 1 O 2 results from superoxide bimolecular disproportionation.